Nokian Hakkapeliitta 01 255/40R18XL 99T - T433676

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What 255/40R18 means

In the size 255/40R18, 255 is the section width in millimeters (10.04 in), 40 is the aspect ratio — the sidewall stands 40% as tall as the tire is wide, or 102.0 mm (4.02 in) — R denotes radial construction, and 18 is the wheel diameter in inches. That works out to an overall diameter of about 26.03 inches, turning roughly 775 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.

The service description on this tire decodes to a load index of 99 — a maximum load of 1,709 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.

Load Range E corresponds to a 10-ply rating.

Specifications

Frequently asked questions

Will 255/40R18 tires fit my vehicle?

Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 255/40R18, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 255/40R18 tire in stock to compare options.

What does 99T mean on the Nokian Hakkapeliitta 01?

99T breaks down as load index 99 — rated for 1,709 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.

What kind of tire is the Nokian Hakkapeliitta 01?

The Nokian Hakkapeliitta 01 in 255/40R18 is a winter tire.

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